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donkergroep.com

https://donkergroep.com· First analyzed 31 May 2026· Updated 31 May 2026
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donkergroep.com
Desktop screenshot of donkergroep.com
Mobile screenshot of donkergroep.com
Mobile

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Hosting Provider

CJ2 Hosting B.V

IP Address

195.216.246.66

Site Location

🇳🇱 Netherlandsvia phone

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS39704

Organization

CJ2 Hosting B.V

Nameservers

ns2.argewebhosting.com.ns1.argewebhosting.eu.ns3.argewebhosting.nl.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
892 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
956 KB
39 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Umbraco

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

UI Components

1
Swiper

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

SEO Analysis

A84/100
25
3
0
Meta Tags13/15
Content11/12
Headings8/8
Technical21/25
E-E-A-T5/7
Images6/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
D
donkergroep.comdonkergroep.com

Donker Groep - Wij verbinden mens en natuur met elkaar

We willen mens en natuur opnieuw met elkaar verbinden door als partner van de natuur een inspirerende gezonde leefomgeving te creëren, zowel buiten als binne...

Description truncated.
Title Length54 chars

Recommended: 50-60 chars (~339px / 580px)

Description Length244 chars

Recommended: 120-160 chars

Issues (0)

    3 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    5 URLs

    robots.txt

    5 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    17/100
    Poor
    5 11 1

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D47/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    1/25
    Citation
    15/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    navheader/footer
    Text ratio:4%
    Words:549
    Token eff.:Optimal
    Sections/1K:40.1
    Depth:2/5

    Structured Data

    1 JSON-LD
    sameAs entity links

    Citation Readiness

    Opening Summary31w
    Descriptive Headingsavg 2.5w
    Canonical URL
    Open Graph3/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (8)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A
    84/100
    13
    Passed
    1
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    10/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    13/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    9/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •Accessibility recommendation preview...
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    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    66/100
    B
    97 mg
    CO₂e / view
    955.7 KB
    Page Weight
    70%
    Cleaner Than
    New Visitor
    110 mg
    vs
    Returning (cached)
    55 mg
    Annual (10K/mo)
    11.6 kg
    Emission Segments
    Data Center
    5 mg
    Network
    28 mg
    Device
    63 mg
    Resource Breakdown
    JavaScript
    40.3 KB
    Images
    761.7 KB
    CSS
    124.1 KB
    HTML
    29.6 KB
    Green Hosting Verified
    CJ2 Hosting BV
    GWF Verified
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    C

    Security Score

    66%Fair
    Interactive

    HTTPS

    No WAF

    37d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    09.04.2026

    Valid Until

    08.07.2026

    Subject Alternative Names (6)

    donkerdesign.comdonkergroen.comdonkergroep.comwww.donkerdesign.comwww.donkergroen.comwww.donkergroep.com

    SHA-256 Fingerprint

    35:D3:DF:3C:D0:04:67:D8:59:C2:21:A7:01:02:A4:03:A1:15:77:18...

    Top Recommendations

    Security recommendation preview

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    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-cache, no-store)
    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html; charset=utf-8
    date
    Sun, 31 May 2026 07:26:45 GMT
    expect-ct
    max-age=86400
    permissions-policy
    accelerometer=(), camera=(), geolocation=(), gyroscope=(), m...
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    98

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    donkergroep-com.mail.protection.outlook.com

    Domain Information

    donkergroep.com

    Domain Age
    8y 1m

    Created

    04.04.2018

    Expires

    04.04.2027

    Last Updated

    04.04.2026

    Registrar

    Hosting Concepts B.V. d/b/a Registrar.eu

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    Privacy policy page linked

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    C
    68/100
    Mobile Friendly1 breakpoint
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1, viewport-fit=cover
    2 recommendations
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    Plus Jakarta Sans

    WCAG AAA
    77/100
    Readability
    /30
    21/30

    22px · LH 1.70

    Hierarchy
    /20
    13/20

    1.09x ratio · ✓ H1→H6

    WCAG
    /25
    25/25

    7.78:1 min contrast

    Performance
    /25
    18/25

    1 font · 4 req

    Heading Font

    Plus Jakarta Sans

    Sans24px

    Body Font

    Plus Jakarta Sans

    Sans22px

    Contrast Ratio

    7.78:1

    WCAG AAA (≥7:1)

    Reading Comfort

    ~43 CPL

    Narrow lines
    24px
    h1
    90px
    h2
    100px
    h3
    18px
    h4
    22px
    p
    Major Sixth
    Scale

    ✅ Excellent readability: 22px body text is ideal for all devices.

    ⚠️ Hard to read: Flesch score 35/100. Simplify sentences for wider reach.

    ✅ WCAG AAA contrast: All text meets 7:1 ratio (min 7.8:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

    ✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

    Buy on MyFontsFluid Type (rem)Flesch 35

    Color Palette

    7 unique colors
    15.2:1 AAA Light
    #ffffff
    Primary· 32.3%
    #252624
    Other· 16.9%
    #16130d
    Secondary· 18.7%
    #040504
    Text· 5.8%
    #a37f64
    Secondary· 2%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google AnalyticsFree
    Google Tag ManagerFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    19 Resources

    16
    Scripts
    3
    Styles
    7
    Async
    3
    Defer

    Top Script Sources

    local(5)googletagmanager.com(2)youtube.com(2)player.vimeo.com(2)cdn.jsdelivr.net(1)

    Website Identity

    Donker Groep

    Corporation
    +31850183590
    donkergroep.com/nl/
    8 years old
    Location detected: 🇳🇱 Netherlandsvia phone
    Hosting Concepts B.V. d/b/a Registrar.eu📧 Microsoft 365nl

    Sponsored

    Last analyzed: 31 May 2026 at 07:27

    Historical Analysis & Change Tracking